import * as http from "http";
import * as https from "https";
import type { FetchRequest, IConfigCatConfigFetcher } from "../ConfigFetcher.js";
import { FetchResponse } from "../ConfigFetcher.js";
export interface INodeHttpConfigFetcherOptions {
    /**
     * The {@link https://nodejs.org/api/http.html#class-httpagent | http.Agent} instance to use for non-secure HTTP communication.
     * For example, this option allows you to configure the SDK to route `http://...` requests through an HTTP, HTTPS or SOCKS proxy.
     *
     * If not set, the default agent, {@link https://nodejs.org/api/http.html#httpglobalagent | http.globalAgent} will be used.
     *
     * This option applies when the SDK connects to a custom `http://...` URL you specified via `baseUrl`.
     */
    httpAgent?: http.Agent | null;
    /**
     * The {@link https://nodejs.org/api/https.html#class-httpsagent | https.Agent} instance to use for secure HTTP communication.
     * For example, this option allows you to configure the SDK to route `https://...` requests through an HTTP, HTTPS or SOCKS proxy.
     *
     * If not set, the default agent, {@link https://nodejs.org/api/https.html#httpsglobalagent | https.globalAgent} will be used.
     *
     * This option applies when the SDK connects to the ConfigCat CDN or a custom `https://...` URL you specified via `baseUrl`.
     */
    httpsAgent?: https.Agent | null;
}
export declare class NodeHttpConfigFetcher implements IConfigCatConfigFetcher {
    private static getFactory;
    private logger;
    private readonly httpAgent;
    private readonly httpsAgent;
    constructor(options?: INodeHttpConfigFetcherOptions);
    private handleResponse;
    fetchAsync(request: FetchRequest): Promise<FetchResponse>;
    protected setRequestHeaders(requestOptions: {
        headers?: Record<string, number | string | string[]>;
    }, headers: ReadonlyArray<readonly [string, string]>): void;
}